So, you’ve joined the ranks of BMW enthusiasts and snagged yourself a 318ti – excellent choice! It sounds like you’re diving right into modifications, with a 328i donor car in mind for an OBD2 swap. Smart move to boost the power in your compact BMW. Let’s tackle some of the common questions that arise when planning a 318ti Obd2 Swap, particularly when using a 328i as a donor.
One of the first hurdles many DIYers encounter is engine compatibility, especially when mixing automatic and manual components. You’re right to question if an automatic 328i engine will work in your manual 318ti. The good news is, yes, an engine from an automatic 328i can absolutely be used in your manual 318ti project. The engine itself (the long block) is fundamentally the same whether it was originally paired with an automatic or manual transmission. Any differences are typically in the ancillaries, which you’ll likely be swapping over anyway.
Moving onto the electronics, you’re on the right track with swapping the DME (Digital Motor Electronics), EWS (Electronic Immobilizer System), and key components. For an OBD2 swap to function correctly, swapping the DME, EWS, and the key transponder/ring is essential and generally plug and play. This trio works together for engine management and security. Using the set from your 328i donor car ensures that the engine and electronics are communicating properly.
Finally, transmission and drivetrain fitment is crucial. You’re asking about using your stock 318ti transmission with the M52 engine from the 328i. Yes, the stock 318ti transmission (Getrag 250 in most cases) will bolt up to the M52 engine. This is a common practice for budget-friendly swaps. Regarding the driveshaft, you are also correct; the stock 318ti driveshaft should have enough slip in the slip joint to accommodate the slightly longer M52 engine block. Many enthusiasts run this setup initially without issue, especially for street use. A stronger clutch designed for the increased power of the M52 is definitely recommended to handle the extra torque and prevent premature wear.
In conclusion, your plan for a 318ti OBD2 swap using a 328i donor is definitely feasible. Addressing the DME, EWS, and considering clutch upgrades are key steps. Enjoy the process of breathing new life into your 318ti!
